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• W3202185191 abstract "Crested auklets (Aethia cristatella) are colonial seabirds with brilliant orange bills during the breeding season. We characterized the bill pigment with spectroscopy methods (resonance Raman, fluorescence, absorbance). We excluded carotenoids as a possible chromophore and showed that the pigment most closely resembles pterins. Like pterins the bill pigment fluoresces, and it occurred in two phenotypes that may differ geographically, perhaps due to environmental heterogeneity. The pigment is unique in the Genus Aethia, and its spectra did not match any known molecule. The UV-Vis absorbance spectrum of the bill pigment overlaps with the extracted pigment of euphausiids, a favored food of crested auklets. A color preference associated with prey may have favored characteristics of the crested auklet's accessory bill plates. Crest size, a signal of dominance, tended to correlate positively with highest fluorescence in the single-band phenotype. Brighter bills may function in self-advertisement and verify the status signal of the crest ornament. We tested for a behavioral preference using identical decoys that differed only in bill fluorescence. Crested auklets approached models with fluorescent bills at a higher frequency. In cases where sex of crested auklets was known, males responded at a higher frequency to fluorescent bills, but females did not. In an evolutionary context, bill fluorescence could have conferred an advantage in social interactions, e.g., in dimly lit rock crevices. Bill brightness and color may communicate success in foraging and may function as an honest signal of mate quality." @default.
• W3202185191 created "2021-10-11" @default.
• W3202185191 creator A5022937034 @default.
• W3202185191 creator A5023783041 @default.
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• W3202185191 date "2021-09-25" @default.
• W3202185191 modified "2023-10-09" @default.
• W3202185191 title "Brighter is better: bill fluorescence increases social attraction in a colonial seabird and reveals a potential link with foraging" @default.
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• W3202185191 doi "https://doi.org/10.1007/s00265-021-03087-0" @default.
• W3202185191 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8612468" @default.
• W3202185191 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34840402" @default.
• W3202185191 hasPublicationYear "2021" @default.
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• W3202185191 hasAuthorship W3202185191A5022937034 @default.
• W3202185191 hasAuthorship W3202185191A5023783041 @default.

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